Add reference to manifest entries in expand subcommand help (bugfix)

[pieqq]

Description

Following #1489, the expand subcommand now also lists manifest entries. This is now reflected in the subcommand help.

Resolved issues

Documentation

$ checkbox-cli expand --help
usage: checkbox-cli [-h] [-f FORMAT] TEST_PLAN

Expand a given test plan: display all the jobs, templates and manifest entries that are defined in this test plan and that  would be executed if ran. This is useful to visualize the full list of units called for complex test plans that consist of many nested parts with different 'include' and 'exclude' sections.

NOTE: the elements listed here are not sorted by execution order. To see the execution order, please use the 'list-bootstrapped' command instead.

positional arguments:
  TEST_PLAN             test-plan id to expand

options:
  -h, --help            show this help message and exit
  -f FORMAT, --format FORMAT
                        output format: 'text' or 'json' (default: text)

Tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.78%. Comparing base (60b6702) to head (59cd535).
Report is 89 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1558   +/-   ##
=======================================
  Coverage   47.78%   47.78%           
=======================================
  Files         370      370           
  Lines       39751    39751           
  Branches     6720     6720           
=======================================
  Hits        18997    18997           
  Misses      20042    20042           
  Partials      712      712           

Flag	Coverage Δ
checkbox-ng	68.28% <ø> (ø)

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[Hook25]

thanks